Turning off anti-aliasing: inconsistency between 'info' window and valid python commands
The anti-aliasing for the Workbench engine can be turned off through:

bpy.context.scene.display.render_aa = 'OFF'


The API manual is very helpful for cases where the Python command is unclear. The render_aa property is part of the class bpy.types.SceneDisplay. Searching for this type shows that bpy.context.scene contains a reference to an object of that type.

The reason why the command is displayed incorrectly seems related to T69803. The Python tooltips are incomplete for PropertyGroups because RNA_path_full_property_py_ex()(rna_access.c) doesn't return a full path. This is also the reason why you see Python tooltips with missing parts like bpy.data.scenes["Scene"] ... render_aa for the Render anti-aliasing property in the UI.

TL;DR It's a bug.